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    <title>Document</title>
    <style>
        /* .active+.active {
        color: red;
    } */

        /* li:not(.active)+.active {
        color: red;
    } */
    </style>
    <script>
        // Number.MAX_VALUE
        // Number.MAX_SAFE_INTEGER
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<body>
    <ul>
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        </div>
    </ul>
    <script>
        function say(a, b) {
            console.log(this, a, b)
        }
        let fn1 = say.bind('abc', 1, 2)
        fn1()
        // document.querySelector('#box').addEventListener('scroll', function (e) {
        //     console.log(567)
        // })
    </script>
</body>

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